2004 Chevrolet Astro Owner's Manual - Page 141

Rear Heating System Your vehicle may have a rear heating system that allows you to adjust the amount of air flowing into the rear of the vehicle, from the front-seating area. This feature works with the main climate-control system in your vehicle. Rear Air Conditioning System Your vehicle may have a rear air-conditioning system that allows you to adjust the fan speed in the rear-seating area, from the front-seating area. This feature works with the main climate-control system in your vehicle. The thumbwheel for this system is located to the right of the audio system. Turn the thumbwheel up or down to increase or decrease the amount of heated air sent to the rear-seating area. The thumbwheel for this system is located to the right of the rear-heating system. Turn the thumbwheel up or down to increase or decrease the amount of cooled air sent to the rear-seating area. 3-21